Neil Patrick Harris doesn’t turn off the comedy when the camera stops. The “How I Met Your Mother” star had fellow diners in stitches at new Midtown restaurant Lexington Brass. Harris, who was joined by boyfriend David Burtka and co-star Cobie Smulders, ordered food before a diner overheard him ordering a signature cocktail, the Lexington Sour, joking, “That was the name they called me in prison.” Spies said the star seemed relaxed and used to having an audience.